Microchip Technology, Inc. Analog to Digital Converters (ADC) MCP3422A4T-E/MS

The MCP3422A4T-E/MS is an 18-bit delta-sigma analog-to-digital converter (ADC) featuring two differential input channels. It offers a full-scale differential input range of ¬±2.048V, facilitated by an on-board 2.048V voltage reference with an accuracy of ¬±0.05% and a drift of 15 ppm/¬8C. The device includes a programmable gain amplifier (PGA) with selectable gains of 1, 2, 4, or 8, allowing for high-resolution conversion of weak input signals. The MCP3422A4T-E/MS supports multiple programmable data rates: 3.75 SPS at 18 bits, 15 SPS at 16 bits, 60 SPS at 14 bits, and 240 SPS at 12 bits. It can operate in either one-shot or continuous conversion modes, optimizing current consumption, which is typically 135 ¬µA during continuous operation and 36 ¬µA in one-shot mode. The device operates from a single supply voltage ranging from 2.7V to 5.5V and features an I¬=C interface for communication, supporting standard, fast, and high-speed modes. This ADC is suitable for applications in portable instrumentation, temperature sensing, bridge sensing, weigh scales, and battery fuel gauges, with an extended operating temperature range of -40¬8C to +125¬8C.